Carbon
Ownby P D, Yang X, Liu J
Journal of the American Ceramic Society 75 (1992) 1876-1883
Calculated X-ray diffraction data for diamond polytypes
Note: rhombohedral, 21R structure
Note: theoretically calculated structure values
_database_code_amcsd 0014071
2.5221 2.5221 43.2450 90 90 120 R-3m
atom x y      z
C1   0 0 .01786
C2   0 0 .17262
C3   0 0 .20833
C4   0 0 .26786
C5   0 0 .30357
C6   0 0 .41071
C7   0 0 .44643